Improvement in sash-balances



J. G.M HAMILTON.

SASH BALANCE.

y ment of the on the. under side of the lower sash,

anni saai datent dimite.

Leners Patent N 105,330, am; July 12, 1870 IMPRVEMENT .IN SASH-BALANCES.

'-ems--w The Schedule referred to in these Lettera Patent and makingpart of the sama To all whom 'it may concern.-

Be it4 known that -I, JAMES G. M. HAMILTON, of Shavexs Greek, in thecounty of Huntingdon, in the State of Pennsylvania, have inventedce1-tain Improvements in Sash-Balances, ot' which the following is aspecification.

The objectV of this invention is to avoid dilicnlties heretoforeexisting in the construction of the contriv- Y'ances used in adjustingthe sash of windows, so that both the cords used in such way shall bemade to assume and have the same length from the sash to the center orbalance-pulley, and from there to the wind` ing-shalt, and that equaltension shall be had upon both, and the cords lneverbccome entangled inwinding 'about the shaft in operation; and

It consists in the peculiar construction and arrangepartsthat operate toeffect 'the 4ohiect above stated. l

In the drawing- Figure 1 is a front view frame, showing thebalance-pulleys, guide-pulleys, cord, and adjusting devices, in dottedlines;

Figure 2 is a transverse sectional view ot' same; Figure 3 is atransverse sectional view of some of the adjusting devices; and p Figure4'is a longitudinal'view of the same. V

A represents a window-frame, which is of the ordinary construction.

B B are the sashes of a window, fitted to slide frecly in frame A, inthe usual manner. v

t a are the balance-pulleys, b b, the guide-pulleys, and b b', the cordsthat are attachedto the shalt in the usual way, and pass over thebalance-pulleys a a, around the guide-pulleys, thence in yaguide-channel thence to the eye screw-bolts d al, to which they areattached.

llhere is'inscrted in the bottom rail of the lower sash, by any sure andconvenient means, a windingshalt, C, having its outer turning knob O',nut g, and center dividingzwheel c, which has lugs c' on opposite sidesoi' the center, through which shaft C goes, and to which it is madefast.

In each of these lugsor projections is a hole, to admit the eyescrew-bolt d.

These eye screw-bolts d harccycs d at one end, and in which one endofthe cord b is attached.

At the other ends of the eye screw-bolts a screwthread is cut, toreceive a square nut, f, the eye screwbolt being so constructed that, byturning thcV nut in o'f the `saslrand windowone direction against thelug of wheel C, the bolt E will be shortened in its projection from thelng, and, by turning the nut 'in the opposite direction, the spiralspring e, that embraces the cye-bolt d, between the lug and a shoulderor projection ont-he eye-bolt, the

'bolt Z is forced out, so that the eye to which the cord is attachedwill be further from the lug c', and by whicli'means either ofthe cordscan be so adjusted as that the two cords will have the same length, andan equal tension.

lhc shaft C may be turned by plaeinga wrcnch upon the square nut g, thatis, between the ratchetwheelD and hand-knob C', orV by the knob C', andwhen in the proper position, is held in place by pawl h, dropping introthe teeth ofthe ratchet-wheel l).

'lo adjnstgthe length and tension of theV cords b b', a wrench isapplied to nntf, on eye screw-bolt d, and turned inthe direction tomalte the cord looser or tighter, as may be desired.-V

lhis arrangement to adjust the length and tension of the cords isbelieved'to be an entirely new feature, and is very desirable onsash-balances.

The dividing-.wheel c has another very important duty to perform,byprcventing the two cords, in winding upon tie shaft (l, from becomingentangled together. g

As the cords b' b are attached to the eye-bolts in such manner that, asthe shaft C is turned, one cord winds upon the shaft C on one side ofthc dividingwheel'r c, and the other cord is made towind upon shalt C onthe other side of the said dividing-wheel c, by which-means the two`cords are prevented from over coming in `contact.

Having thus described my invention,

What .I claim, and desire to secure by 'Leiters Patent, is,-

1. The eye screw-bolts d, in combination with the spiral screw c, nut f,and lug c', of wheel c, constructed and arranged to operate in themanner and for the purposedescribcd.

2. 'lhc dividing-wheel c, having the lugs c', eye

`screw-bolts d, spring c, and nuts f, in comlination with thewinding-shaft C, either with or without handkuob O', ratchet-wheel 1),and pawl h., constructed and arranged to operatey in the manner and forthe l purpose described.

' J. C. M. HAMILTON.

Witnesses:

Jlosnrfrr JOHNSTON, J. E. WILSON.

